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Neurosci Lett. 2011 Nov 14;505(2):134-9. doi: 10.1016/j.neulet.2011.10.006. Epub 2011 Oct 8.

Interdependence of measures in pavlovian conditioned freezing.

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  • 1The Learning Lab, Department of Psychology, Columbia University, New York, NY 10027, USA.


Pavlovian conditioned freezing is an intensively utilized paradigm that has become a standard model of memory and cognition. Despite its widespread use, the interdependence among each measure commonly reported in fear conditioning studies has not been described. Using mice, we examine the relationship of each common freezing measure (Training Baseline, Post-Shock freezing, Contextual Fear, Tone Baseline, and Tone Fear), as well as baseline locomotor activity measures, to better understand the significance of each. Of particular interest, Post-Shock freezing appears to be a good measure of immediate contextual memory. In contrast, Tone Baseline freezing, as typically measured in a novel context, appears to be contaminated with multiple sources of fear. Finally, Contextual and Tone Fear show a weak interdependence.

Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

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